发明名称 |
Lighting apparatus for high-pressure discharge lamp and projector |
摘要 |
A lighting apparatus for a high-pressure discharge lamp that has an electric discharge container made of quartz glass, and containing a pair of counter electrodes and a power supply unit that supplies AC current to the high-pressure discharge lamp. The power supply unit has a stationary power lighting mode and a modulated power lighting mode that supplies current having power less than power in the stationary power lighting mode. The modulated power lighting mode supplies a rectangular AC current having a first term and a second term. A mean high-frequency current value supplied to a first electrode is greater than a mean current value supplied to a second electrode in the first term. A current is supplied to the second electrode for a term longer than the half-cycle period in the second term, the current being lower than the mean high-frequency current value supplied to the first electrode.
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申请公布号 |
US2011128508(A1) |
申请公布日期 |
2011.06.02 |
申请号 |
US20100926616 |
申请日期 |
2010.11.30 |
申请人 |
USHIO DENKI KABUSHIKI KAISHA |
发明人 |
YAMADA KOJI;SAMEJIMA TAKANORI;YAMASHITA TAKASHI |
分类号 |
H05B41/16;G03B21/20 |
主分类号 |
H05B41/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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